diff --git a/packages/backend/migration/1709530777533-autoDeleteNotes.js b/packages/backend/migration/1709530777533-autoDeleteNotes.js
new file mode 100644
index 0000000000..2b296c4f29
--- /dev/null
+++ b/packages/backend/migration/1709530777533-autoDeleteNotes.js
@@ -0,0 +1,14 @@
+export class AutoDeleteNotes1709530777533 {
+    name = "AutoDeleteNotes1709530777533";
+
+	async up(queryRunner) {
+		await queryRunner.query(`ALTER TABLE user_profile ADD "autoDeleteNotes" boolean NOT NULL DEFAULT false;`);
+		await queryRunner.query(`ALTER TABLE user_profile ADD "autoDeleteNotesMinutes" integer NOT NULL DEFAULT 43200;`);
+    }
+
+	async down(queryRunner) {
+		await queryRunner.query(`ALTER TABLE user_profile DROP COLUMN "autoDeleteNotes";`);
+		await queryRunner.query(`ALTER TABLE user_profile DROP COLUMN "autoDeleteNotesMinutes";`);
+	}
+
+}
diff --git a/packages/backend/src/core/entities/UserEntityService.ts b/packages/backend/src/core/entities/UserEntityService.ts
index 8f5d986fac..20a3ca64c7 100644
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@@ -509,6 +509,8 @@ export class UserEntityService implements OnModuleInit {
 				mutedWords: profile!.mutedWords,
 				hardMutedWords: profile!.hardMutedWords,
 				mutedInstances: profile!.mutedInstances,
+				autoDeleteNotes: profile!.autoDeleteNotes,
+				autoDeleteNotesMinutes: profile!.autoDeleteNotesMinutes,
 				mutingNotificationTypes: [], // 後方互換性のため
 				notificationRecieveConfig: profile!.notificationRecieveConfig,
 				emailNotificationTypes: profile!.emailNotificationTypes,
diff --git a/packages/backend/src/models/UserProfile.ts b/packages/backend/src/models/UserProfile.ts
index 40ea26f610..f0e06866a4 100644
--- a/packages/backend/src/models/UserProfile.ts
+++ b/packages/backend/src/models/UserProfile.ts
@@ -277,6 +277,17 @@ export class MiUserProfile {
 		unlockedAt: number;
 	}[];
 
+	@Column('boolean', {
+		default: false,
+	})
+	public autoDeleteNotes: boolean;
+
+	@Column('integer', {
+		default: 43200, // 30 days in minutes
+	})
+	public autoDeleteNotesMinutes: number;
+
+
 	//#region Denormalized fields
 	@Index()
 	@Column('varchar', {
diff --git a/packages/backend/src/models/json-schema/user.ts b/packages/backend/src/models/json-schema/user.ts
index 33a3efd453..c31291a6a4 100644
--- a/packages/backend/src/models/json-schema/user.ts
+++ b/packages/backend/src/models/json-schema/user.ts
@@ -605,6 +605,14 @@ export const packedMeDetailedOnlySchema = {
 				nullable: false, optional: false,
 			},
 		},
+		autoDeleteNotes: {
+			type: 'boolean',
+			nullable: false, optional: false,
+		},
+		autoDeleteNotesMinutes: {
+			type: 'number',
+			nullable: false, optional: false,
+		},
 		notificationRecieveConfig: {
 			type: 'object',
 			nullable: false, optional: false,
diff --git a/packages/backend/src/server/api/endpoints/admin/show-user.ts b/packages/backend/src/server/api/endpoints/admin/show-user.ts
index 9cdca02224..818322eb8e 100644
--- a/packages/backend/src/server/api/endpoints/admin/show-user.ts
+++ b/packages/backend/src/server/api/endpoints/admin/show-user.ts
@@ -88,6 +88,14 @@ export const meta = {
 					type: 'string',
 				},
 			},
+			autoDeleteNotes: {
+				type: 'boolean',
+				optional: false, nullable: false,
+			},
+			autoDeleteNotesMinutes: {
+				type: 'number',
+				optional: false, nullable: false,
+			},
 			notificationRecieveConfig: {
 				type: 'object',
 				optional: false, nullable: false,
@@ -239,6 +247,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				receiveAnnouncementEmail: profile.receiveAnnouncementEmail,
 				mutedWords: profile.mutedWords,
 				mutedInstances: profile.mutedInstances,
+				autoDeleteNotesMinutes: profile.autoDeleteNotesMinutes,
+				autoDeleteNotes: profile.autoDeleteNotes,
 				notificationRecieveConfig: profile.notificationRecieveConfig,
 				isModerator: isModerator,
 				isSilenced: isSilenced,
diff --git a/packages/backend/src/server/api/endpoints/i/update.ts b/packages/backend/src/server/api/endpoints/i/update.ts
index cb413de9ee..7bd3cbf68d 100644
--- a/packages/backend/src/server/api/endpoints/i/update.ts
+++ b/packages/backend/src/server/api/endpoints/i/update.ts
@@ -202,6 +202,8 @@ export const paramDef = {
 		mutedInstances: { type: 'array', items: {
 			type: 'string',
 		} },
+		autoDeleteNotes: { type: 'boolean', nullable: false },
+		autoDeleteNotesMinutes: { type: 'number', nullable: false, minimum: 1 },
 		notificationRecieveConfig: {
 			type: 'object',
 			nullable: false,
@@ -319,6 +321,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				profileUpdates.hardMutedWords = ps.hardMutedWords;
 			}
 			if (ps.mutedInstances !== undefined) profileUpdates.mutedInstances = ps.mutedInstances;
+			if (ps.autoDeleteNotes !== undefined) profileUpdates.autoDeleteNotes = ps.autoDeleteNotes;
+			if (ps.autoDeleteNotesMinutes !== undefined) profileUpdates.autoDeleteNotesMinutes = ps.autoDeleteNotesMinutes;
 			if (ps.notificationRecieveConfig !== undefined) profileUpdates.notificationRecieveConfig = ps.notificationRecieveConfig;
 			if (typeof ps.isLocked === 'boolean') updates.isLocked = ps.isLocked;
 			if (typeof ps.isExplorable === 'boolean') updates.isExplorable = ps.isExplorable;